Type-writing machine.



C. P. RICHARDSON.

TYPE WRITING MACHINE.

ABPLIGATION FILED SEPT. zo, 1910.

1,126,278. I Patented Jan.26, 1915.

2 SHEETS-SHEET 1.

IIIIIIINIIMMWIII o y o 000000060021951 o0000 30090 @nue/nto@ C. F. RICHARDSON. TYPE WRITING MACHINE.

Y APPLICATION FILED SBPT.20,1V910. 4 1,126,27`S l Patented Ja11.26, 1915.

2 SHEETS-SHEET 2.

awww/coz Y @Hammam WMQOQ un. tran si JAMES A. VVHITCOMB,

0F NEW YORK, N. Y.

TYPE-WRITING MACHINE.

specification of Leners raient.

Tatented Jan. 26, 1915..

Application led September 20, 1910. Serial No. 582,891.

To all wiwi/1. it may concem Be it known that 1, CHAnLEs F. RICHARD- soN, a citizen of the United States, and a resident of lVoonsocket, county of lrovidence, State of Rhode Island, have invented certa-in new and useful Improvements in Type-lVriting Machines, of which the following is a specification.

This invention relates broadly to in provenients in typewriting machines and specifically to type rests particularly adapted for machines knovvn as bar typewriters.

The principal object of this invention is to construct a type bar rest having a greater radius of curvature than the radius of curvature of the segment upon which the type bars are mounted.

Another object "of this invention is to pro- .vide a type bar rest of such construction that type' bars near the center of the rest move through a smaller segment of an arc in moving from their position of rest on the type bar to the printing point, than that through which the bars located at the eX- treniity of the rest move.

Another object of this invention is to construct a type bar rest in such manner that the bridge portion, the backing and the rest proper may be Iall formed from a single sheet of metal. Another object of this invention is to construct a combined type bar rest and key y lever spring supporting bridge.

Still other and further objects of this invention Will, in part be obvious and Will im part be pointed out in the specilication which fellows hereinafter, by reference to the drawings in which like numerals are used to indicate like parts throughout the ,several figures, and the scope` of the invenf tion Will be indicated by the appended claims.

Figure 1 is a View showing a portion of the typewriting machine in sectional elevation. Fig. 2 is a view showing the rear of a typewriting machine in elevation, and illustrating the diiierence in curvature between the type bar hanger segment and the type bar rest. Fig. 3 is a front perspective v-ievv or the type bar rest. Fig. 4 is a rear perspective view or' the type bar rest.

cover and protect Referring particularly to the drawings, a type bar rest 1 is attached to the sides 2 and i, by means of screws 5 and G, which pass through openings 7 and 8 in bracket portions S) and 10 of the type bar rest, and are screwed into the side frames 2 and'll, in such manner that the type bar rest 1, becomes a bracing member across the upper part of the machine frame to maintain the side frames 2 and si, in rigid relationship. This feature is of considerable importance for the reason that the machine frame 3, is made of a single piece of sheet metal in the form of an open shaped U, having the open portions thereof toward the front. Key levers l1, 12 and 14, are pivotally mounted upon key lever pivot rods 15, 16 and 17 respectively, which are also ixedly mounted in the sides 2 and 4 of the machine frame 3. The key levers 15, 16 and 17, are provided at their front portions with linger caps 18, 19 and 2O respectively, and at their rear ends are provided with connecting eyes 21. Type bar hangers 22, are mounted upon a segment 24,

that is formed in the rear Wall of the Inachine frame 3. Type bars 25 are pivotally mounted in the type bar hangers 22, and are connected to the connecting eyes 21, carried by the key levers, by means of links 26. The type bars'are provided on their forward ends with type heads 27, that are adapted to rest upon a resilient pad 28, that is carried by the lower curved Wall 29 of the type bar restl. Key lever returning springs 30, 31 and 32, are adapted to be suspended from a bridge portion 34, of the type bar rest 1, by engaging loops which pass through openings 35 at the rear end of the bridge portion 34, and are attached at their lower ends to the key levers 11, 12 and 1.4L respectively. A front board 36, is mounted between the ,side Walls 2 and el of the machine frame, and is adapted to substantially the key lever springs 30, 31 and 3.2.

" Referring particularly to Fig. 2 of the drawings, it will be noted that the radius of curvature of the type bar hanger segment 24, is considerably shorter than the radius of curvature upon which the curved wall 29 of the type bar rest is formed. Since the theii rear ends in the hangers 22, andi'est at their forward ends upon the resilient pad 28,

lcarried by the curved wall 29 of the type bar rest, it will be noted that the type head on the middle type bar will travel a shorter seg- ,Inent of an arc from its position to rest on the pad to the printing point on the platen., than the segment of arc which will be trav eled by the type head on the type bar mountM ed in a hanger located at the extremity of the type bar segment, It will also be seen that the angle formed between 'the printing point, the pivot of the type bar and the 'type upon the type bar head, considering the pivot of the type bar an apex of the angle,

will-be more acute for the type bars mounted at the middle of the segment, than for the type bars mounted at the extremities of thev segment when the type bars are in their position of rest upon the type bar rest. This relationship of the difference in length of radii between the type bar segment and the type bar rest, enables the 'type at the eX- tremity of the type bar segment to fan out at their type carrying ends, and therefore the type bars are separated a greater distance at their forward ends than at their rear ends when the type bars are in normal position on the type bar rest. This is of great advantage in gaining space between the type heads for the outer bars, for the ream` son that the typeibars at the outer ends of the segment are bent at a considerable angle to the body of the bar and are apt to interfere,v with each other when dropping baol to normal position on the type bar rest.

Referring particularly to the type bar rest 1 per se, it comprises a single piece of sheet metal formed with bracket portions 9V and l0, between which extends a bridge por- "tioii 311-, which is perforated with a series of holes or openings 35, inordei to support the key lever springs, as has been hereinbefore described. The type rest cui-ved wall 29, is formed by drawing down a'portion of the front edge of the type bar rest into the proper and desired curve, in such manner as to 4leave a back supporting wall 37, between the bridge portion 34- and the curved /wall 29. 4 This particular construction forms an extremely simple, and at the same time, rigid type bar rest which is )articularly adapted to typewriting vmachines of the folding type wherein simplicity of parts and lightness in comparison to strength is of the greatest importance.

Having thus described my invention what I desire to claim is 1. In a typcwriting machine, the combination of a machine frame, a type bar hanger segment attached to said machine frame, type bars mounted upon said type bar hanger segment, means for actuating said type bars, and a 'type rest mounted in said machine frame, the radius of curvature of said type rest beinggreater than the radius of curvature of the type bar hanger segment, said type rest and said segment being so related that a horizontal projection of their curves intersect, substantially as de,- scribed.

2. ln a typewri'ting machine, the combi-- nation of a machine frame, a type bar hanger segment attached to' said machine frame, type bars pivotally mounted upon said type bar segment, key levers pivotally mounted in said machine frame and operatively connected with said type bars, a type bar rest having a straight bridge portion and a curved type bar supporting segment, and key lever returning springs attached to said type bar rest and to said key levers.

3l In a typewriting machine, the conibination of a machine frame, a type bar hanger segment attached to said machine frame, type bars pivoted upon said type bar hanger segment, key levers `pivotally mounted in said machine frame, and operatively connected with said type bars, a type rest being formed upon a segment of a vertical arc of greater radius than the radius ofthe type bar hanger segment, the centers -for said radii being in Adifferent horizontal lines, and

returning springs attached to said type bar rest and to said key levers, substantially as described. t

ll. In a typewriting machine, the combination of a U-shaped frame formed from a single sheet of metal, a type bar rest mounted in said machine frame near the upper middle portion thereof, and constructed in such manner as to form a brace between the walls of said machine frame, and afront board substantially covering said type bar rest, .substantially as described. y

5. As a new article of manufacture, a combined brace and type bar rest and key lever returning spring support, said device comprising a substantially horizontal spring support and a curved type bai' rest for trussing and stiifening said spring support, substanti ally as described.

6. As a new article' of manufacture, a brace including a type bar rest, and a key lever returning spring support formed integral from a single sheet of metal, said spring support bei-"iig a substantially horizontal at plate stiden'e'd by the 'curved type bar rest, said plate and said rest being conneeted throughouttheir respective lengths,

l substantially as described.

7. As 'a new article of 'manufactura Va' type bar rest formed with a straight bridge pol'on and a curved type 'bar supporting segment, substantially as described.

As a ne7 article of manufacture, a type our rest formed from a. single sheet of metal and constructed with straight bridge por" tion, a cuved type bei' supporting membe, and a backing wall between said Curved suppgrtng member and. said blge portion,

substantially as described.

CHARLES FRANCS Wtnes sr Y ARTHUR J. E. LVUDSQN, Roy J. SQUIER. 

